647411872140 has 864 divisors, whose sum is σ = 2372110540800. Its totient is φ = 142263475200.

The previous prime is 647411872103. The next prime is 647411872189. The reversal of 647411872140 is 41278114746.

647411872140 is a `hidden beast` number, since 6 + 474 + 118 + 7 + 21 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1398297549 + ... + 1398298011.

Almost surely, 2^647411872140 is an apocalyptic number.

647411872140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647411872140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1186055270400).

647411872140 is an abundant number, since it is smaller than the sum of its proper divisors (1724698668660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647411872140 is a wasteful number, since it uses less digits than its factorization.

647411872140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

Adding to 647411872140 its reverse (41278114746), we get a palindrome (688689986886).

The spelling of 647411872140 in words is "six hundred forty-seven billion, four hundred eleven million, eight hundred seventy-two thousand, one hundred forty".